diff --git a/nicegui/elements/timer.py b/nicegui/elements/timer.py
index ec263f81e..d43880e0c 100644
--- a/nicegui/elements/timer.py
+++ b/nicegui/elements/timer.py
@@ -126,4 +126,5 @@ def _should_stop(self) -> bool:
     def _cleanup(self) -> None:
         self.callback = None
         assert self.parent_slot
-        self.parent_slot.parent.remove(self)
+        if not self.client._deleted:  # pylint: disable=protected-access
+            self.parent_slot.parent.remove(self)